• Gerd Hoffmann's avatar
    qdev: rework device properties. · ee6847d1
    Gerd Hoffmann authored
    This patch is a major overhaul of the device properties.  The properties
    are saved directly in the device state struct now, the linked list of
    property values is gone.
      * We don't have to maintain the list with the property values.
      * The value in the property list and the value actually used by
        the device can't go out of sync any more (used to happen for
        the pci.devfn == -1 case) because there is only one place where
        the value is stored.
      * A record describing the property is required now, you can't set
        random properties any more.
    There are bus-specific and device-specific properties.  The former
    should be used for properties common to all bus drivers.  Typical
    use case is bus addressing, i.e. pci.devfn and i2c.address.
    Properties have a PropertyInfo struct attached with name, size and
    function pointers to parse and print properties.  A few common property
    types have PropertyInfos defined in qdev-properties.c.  Drivers are free
    to implement their own very special property parsers if needed.
    Properties can have default values.  If unset they are zero-filled.
    Signed-off-by: default avatarGerd Hoffmann <kraxel@redhat.com>
    Signed-off-by: default avatarAnthony Liguori <aliguori@us.ibm.com>
escc.c 26.9 KB